turn-on

Word Origin & History

late Old English turnian "to rotate, revolve," in part also from Old French torner "to turn," both from Latin tornare "turn on a lathe," from tornus "lathe," from Greek tornos "lathe, tool for drawing circles," from PIE root *tere- "to rub, rub by turning, turn, twist" (see throw (v.)). Expression to turn (something) into (something else) probably retains the classical sense of "to shape on a lathe" (attested in English from c.1300). Related: Turned; turning.

To turn up "arrive" is recorded from 1755. Turn-off "something that dampens one's spirits" recorded by 1971 (said to have been in ...

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